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Finding the Fourth Proportional to 86,912.25, 130,147.85 and 72,835.26

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Solution

The fourth proportional to 86,912.25, 130,147.85 and 72,835.26 is: 109,068.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912.25 : 130,147.85 = 72,835.26 : x
  2. Step 2: Convert to fraction form
    86,912.25/130,147.85 = 72,835.26/x
  3. Step 3: Cross multiply
    86,912.25x = 130,147.85 × 72,835.26
  4. Step 4: Simplify right side
    86,912.25x = 9,479,351,478.28
  5. Step 5: Solve for x
    x = 9,479,351,478.28/86,912.25
  6. Step 6: Final answer
    x = 109,068.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.